Declare test dependency using Npm.depends - node.js

Question

I would like to know how to declare a dependency on an Npm module in Meteor only in test.
While testing a package, I can easily declare a Npm dependency in package.js like this:
Npm.depends({
...
'sinon': '1.15.3'
...
});
But I am only using sinon in test, and I want to make it explicit.
I tried the following with no success.
Package.onTest(function(api) {
// # 1
// can't do this because it is not a meteor module
api.use('sinon');
// # 2
// can't because I have other production Npm dependencies
// and Meteor only allows one `Npm.depends` call per `package.js`.
// Also, not sure if nesting Npm.depends() is allowed at all.
Npm.depends({
'sinon': '1.15.3'
});
});
Any suggestions?

Answer 1

The only way to do this is to wrap sinon into a package and api.use it. You can do the following:
$ meteor create --package sinon
Replace the contents of packages/sinon with the following:
package.js
Package.describe({
summary: 'Standalone test spies, stubs and mocks for JavaScript.'
});
Package.onUse(function(api) {
api.versionsFrom('1.0.4');
api.export('sinon', 'server');
api.addFiles('sinon.js');
api.addFiles('post.js');
});
post.js
sinon = this.sinon;
sinon.js
Download the latest version from here.
Finally in the package you are testing, you can add api.use('sinon'); in your Package.onTest.
As an alternative to making your own package, you can just use one of the community versions available here.